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Old 11-23-2002 | 01:46 PM
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From: Glen Robertson, ON, CANADA
Default Re: Boost vs Trim

Originally posted by MonkeyBoy
Boost vs Trim tabs: I just assumed that there were similar. Enlighten me, what's the diff?

I get the 6% to 10% and no more than 30' throw, but what surface unloading should I expect? I don't need an exact number, but what are we talking? 10%? 50%? What about extreme throws, such as 45 degrees. How well do the tabs work in that situation?

Thanks.
I'm affraid I don't have specific numbers. Not even a guess except that with a 25 oz servo controlling the boost tab only with the proper setup you could end up with as much as 5000oz of force.

Normally for extreme throws such as 45 degrees, they will not be as effective, but then at these throws, your airspeed is much lower, or it should be anyway.

Boost tabs operate in unison with the control surface while the trim tab operates independent of the contol input..